The AirTAC LSH Linear Guide Block LSH30BK-F2N-P-B-M6 is a standard-type profile linear guide on a 28 mm wide rail. Four rows of balls contact X-shaped raceways at a 45° angle, so the guide carries load equally in all four directions and absorbs small mounting errors inside the carriage instead of binding.
This SKU is the carriage only from the AirTAC LSH range: an F2 bottom-flange block, standard (N) length, size 30, precision (P) accuracy grade, supplied with an M6 grease nipple and the pairing letter B. No rail is included and none arrives with it - order this on its own only when the rail it must run on is already mounted, sound, and stamped with the same pairing code B. The true rail width for size 30 is 28 mm, not 30, so check the existing rail before ordering. Like every LSH block, it carries four rows of recirculating balls in 45 degree arc raceways, two contact points per ball, and absorbs slight mounting misalignment internally instead of binding.
Per carriage, the ratings are 37.4 kN dynamic (C), 55.0 kN static (C0) and moment limits of 0.66 / 0.67 / 0.67 kN.m (MR/MP/My). A replacement block costs roughly a quarter of a complete set, so swapping the carriage on an undamaged rail is usually the economic repair; LSH carriages within one model are interchangeable, so a fresh block keeps the smoothness of the rail it lands on.
| Model | Airtac LSH Linear Guide Block LSH30BK-F2N-P-B-M6 |
|---|---|
| Series | LSH Series Linear Guide |
| Supplied as | Carriage / block only |
| Construction | Recirculating ball, four ball rows on X-shaped raceways at a 45° contact angle, self-aligning |
| Size code | LSH30 |
| Rail width | 28 mm (the size code is not the rail width above size 20) |
| Carriage style | Flange, bottom mounting |
| Carriage length | Standard carriage |
| Basic dynamic load rating C | 37.4 kN per carriage |
|---|---|
| Basic static load rating C0 | 55.0 kN per carriage |
| Allowable static moment | MR 0.66 / MP 0.67 / My 0.67 kN·m |
| Accuracy grade | P — precision grade |
| Mounting screws | M8 — 3040 N·cm into steel, 2010 cast iron, 1470 aluminium |
| Lubrication | Pre-filled with Mobilux EP2; re-grease every 100 km of travel or every 3–6 months |
| Interchangeability | LSH carriages fit LSH rails of the same model, matched by the pairing code |
Specifications follow the official AirTAC LSH catalogue. The catalogue page does not state the carriage or rail base material. Sizes 35 and 45 exist in the catalogue but are not listed here; they are available to order. This item is a carriage only. Order a complete set if you also need a rail.
| LSH | LSH Series Linear Guide. |
|---|---|
| 30 | Size code — note the rail is 28 mm wide, not 30 mm. |
| BK | Carriage / block only — no rail supplied. |
| H / F1 / F2 / F3 | Carriage style: square, or flange mounted from the top, bottom, or both. |
| N | Standard carriage. |
| P | P — precision grade. |
| Pairing code | Rails and carriages must share a pairing code. Take it from the original part when replacing. |
| -M4 / -M6 / -A01… | Grease nipple or tube-fitting type. Restricted by size: size 15 the M4 family, 20–35 the M6 family, 45 the PT1/8 family. |
| This order | Carriage / block only |
|---|---|
| Rail | No — not supplied with this item |
| Carriage | Yes, one |
This is a carriage on its own. NO RAIL IS INCLUDED. If you are not sure which form you need, send us the machine or the original part number and we will confirm it before you order.
A flatbed CO2 laser cutter's Y-axis block starts to notch and rumble after years of cutting dust; ordering this F2 carriage with pairing code B replaces the worn block while the 28 mm rail stays bolted in place.
During an annual shutdown of a case-palletising cell, fitting fresh size 30 blocks to sound rails restores smooth vertical travel for a fraction of the cost of new guide sets.
A rotary indexing table whose linear transfer station has flat-spotted blocks gets a like-for-like P-accuracy carriage, keeping positioning repeatability intact.
Size the job by load and by moment, not load alone: at 55.0 kN static this block has ample margin on a gantry carrying a few hundred kilograms, but a long cantilever is limited by the 0.66 kN.m MR figure, and a second carriage or a long-block variant addresses that faster than a bigger frame. If the envelope is small and the duty light, step down to LRM instead - its load ratings are not published, so we confirm them against your sketch. Where travel is short and crossed-roller rigidity matters more than long recirculating travel, LGC is the better cross-check. Before ordering, tick the checklist: form (carriage only), size 30 by load and moment, F2 flange mounting from below, standard length, one block, P accuracy with the note that preload, chosen later at set level, always tightens the allowable mounting error, M6 nipple, and the pairing code B read off the original part - the code itself, not a guess from the catalogue.
Quick checklist
Dynamic rating C is 37.4 kN and static C0 is 55.0 kN per block. Allowable moments are MR 0.66, MP 0.67 and My 0.67 kN.m. The P accuracy grade gives a running parallelism band of 3 to 21 um depending on rail length. The mating rail takes M8 screws at 3040 / 2010 / 1470 N.cm in steel, cast iron or aluminium. First grease charge is 5.4 cm3 per standard carriage with 1.7 cm3 top-ups, repeated every 100 km of travel or every 3 to 6 months.
No. This code is carriage only: one F2 flange block with an M6 fitting. There is no rail, no mounting screws and no bolt caps in the delivery. The pairing letter B must match the letter on your existing rail - if you cannot find it, send us the old part number and we will confirm the match by enquiry.
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Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.